So after putting this on hold for months as lot of other personal things were going on at the time (focus dominated by work, and what was left over on becoming a dad) finally had a chance to take it out a few nights ago and reassess. Swear it's getting worse and I'm reaching out to COMP. Horrible grinding noises in the few seconds before it stops spinning when engine is shut off. At about 6000Km / 3900 miles since install now.
I'll be going under on the weekend and seeing if I still have a zerk fitting... maybe I'm another victim of the dreaded loose zerk fittings, who knows. I sure don't.
https://www.youtube.com/watch?v=_gMXGTV96SY